I think that's just one thing that stands out in regards to the pagents that some can shake their head at.

I'm pretty sure a good deal of the dislike tends to come from stereotypes about southern people. "Rednecks" "hicks" etc. I'm from New England...it's pretty common up here to get a lot of jokes about rednecks. I've heard from plenty of people that are from and live down south, that they view a lot of people from up north as rude etc.

So, I think perhaps people removed from that area of the country fall back on the stereotype that as soon as you hear that accent and then couple that with some things they do that others may view as inappropriate..you have a recipe for insults.